Greece's conservatives won 41.8 per cent of the vote and 152 seats in parliamentary elections in September 2007.

Pasok garnered 38.1 per cent of the vote and 102 seats.

Parties expected to pass the three per cent hurdle to enter parliament, include the Communist Pary of Greece KKE, the Coalition of the Radical Left (Syriza) and the ultra-conservative People's Orthodox Alarm (Laos).

Barnaby Phillips, Al Jazeera's correspondent in Athens, said that if there was not a clear winner in the elections, it would "be very bad news for Greece" because of the country's current social and economic problems.

"You would have a caretaker-minority government and the very real possibility of another election, as soon as November," he said.

"I think that is something that Greeks of all political persuasions do not want. There is a consensus that the last thing Greece needs, along with all the economic and social gloom, is a prolonged period of political uncertainty.